Method of making bolts.



E. I. DODDS.

METHOD OF MAKING BOLTS.

APPLICATION FILED JUNE 26, 1914.

Patented Mar. 9, 1915.

INVENTOR WITNESSES &. .ss waas w Wf @Wdii Qliqs citizen of the United States,

the steps of the UNITE STAES PATEN @FIC.

ETHAN I. DODDS, 0F Z ELIENOBLE, PENNSYLVANIA, ASSIGNOR TO KERNER MANUFAC- TURING COMPANY, OF PITTSBURGH; PENNSYLVANIA, A CORPORATION 01? PENN- SYLVANIA.

METHOD OF MAKING BOLTS.

Specification of Letters Patent.

Patented Mar. 9, 1915.

Application filed June 26, 1914. Serial No. 847,453.

T aZZ whom it may concern Be it known that I, ETHAN I. DoDDs, a residing at Zelienople, in the county of Butler and State of Pennsylvania, have invented a new and useful Improvement in Methods of Making Bolts, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which Figure 1 is a perspective view of one form of blank which can be used for making bolts by my improved process; Fig. 2 is an end view of the shearing dies with a blank in position; Fig. 3 is a similar view showing the dies after shearing the blank; Fig. 4c is an end view of a reshaping die showing the blank after it has been returned to its initial shape; Fig. 5 isa side elevation of a blank after it has-been sheared by the die shown in Fig. 3; Fig. 6 is a side elevation of the finished bolt and Fig. 7 is a sectional view on the line VII-VII of Fig. 6.

This invention relates to an improved method of making bolts, for making stay-bolts for locomotive boilers.

The precise nature of my invention will be. best understood by reference to the acoompanying drawings, which will now be described, it being premised, however, that various changes in the apparatus as Well as process may be made, without departing from the spirit and scope of my invention as defined in the appended claims.

In the drawings, '2 indicates the blank, which is placedbetween shearing die membore 3, as indicated in Fig, 2. These die members are then moved relativelyto each.

other to shear the blank, as indicated in Figs. 3 and 5. The blank is then inserted and particularly screw-threaded, as indicatedat 5 in Fig. 6. 1

If desired, the bolt can then be twisted about the longitudinal axis, so that the sheared members will extend in a general spiral di rection.

The advantages of my invention result from the provision of'a cheap and efiicient' method of making bolts.

I claim:

1. The method of forming bolts, which comprises the steps of shearing the body portion along a radial line by means of oppositely moving die members, and then restoring the blank to its initial shape, substantially as described.

2. The method of forming bolts, which comprises the steps of shearing the body portion along a radial line by means of oppositely moving die members, restoring the blank to its initial shape, and then forming securing heads on the ends of the bolts, substantially as described.

3. The method of forming bolts, which comprises the steps of shearing the body portion along a radial line by means of op positely moving die members, restoring the blank to its initial shape, then upsetting the heads on the ends of the blank, and then screw-threading said heads, substantially as described.

In testimony whereof, I have hereunto set my hand.

Gno. B. BLEMING, JEssE B. HELLER. 

